/etc/conf.d/net and multiple interfaces

exazoid · n00b Joined: 01 Nov 2002 Posts: 6

Hi.

I have a setup with multiple interfaces (eth0..2) .

eth0 is dhcp controlled so it is set up correctly automaticly.

I have set static ip-addresses for both eth1 and eth2, but I am having trouble to figure out how to set the "gateway" variable in the end of /etc/conf.d/net, I tried (w/o success) :

gateway="eth1/192.168.0.1 eth2/192.168.1.1"

Any help is greatly appriciated

Exazoid

steveb · Advocate Joined: 18 Sep 2002 Posts: 4564

why don't you add the stuff in /etc/conf.d/local.start:

klieber

exazoid · n00b Joined: 01 Nov 2002 Posts: 6

klieber

exazoid · n00b Joined: 01 Nov 2002 Posts: 6

klieber

jukka

i think exazoid is right. let's see:

to get their config data, all /etc/init.d/net.* scripts source /etc/conf.d/net, don't they? if variable 'gateway' is set as you told, it is first assigned the value 'eth1/192.168.0.1', but this is subsequently overwritten with 'eth2/192.168.1.1'.
when /etc/init.d/net.eth1 is executed, the line
Code:

if [ -n "${gateway}" ] && [ "${gateway%/*}" = "${IFACE}" ]
returns 1, so the route command is not executed, and no default gateway is set for eth1.
when /etc/init.d/net.eth2 is executed, both tests after the if clause return zero, so the default gateway is set.

btw, if i was wrong, why do you have to set the variables iface_ethN, dhcpcd_ethN, alias_ethN, broadcast_ethN and netmask_ethN for every ethernet interface N?

greetings, jukka

klieber · Posted: Sun Jan 05, 2003 6:27 pm Post subject:

Welp -- don't know without combing through the net init script. I do know, however, that that's what my net config file looks like on my firewall and it works for me.

--kurt
_________________
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Naan Yaar · Bodhisattva Joined: 27 Jun 2002 Posts: 1549

This thread covers the same problem. One solution is to have your gateway line as you had it at first:

relyt · Posted: Mon Jan 06, 2003 5:12 pm Post subject:

Isn't the "gateway" variable only for the default route? (ie: there's only one)

Naan Yaar · Bodhisattva Joined: 27 Jun 2002 Posts: 1549

There can be more than one "default" route though with the "Equal cost multipath" routing option enabled in the kernel.

exazoid · n00b Joined: 01 Nov 2002 Posts: 6

No, when you have multiple NICs with multiple connections out to the big cyberspace, you need a default route per connection AND a system default. To make sure the computer is answering through the right ip-number when processing requests.

In "plain ip", you write something like :

relyt · Posted: Mon Jan 06, 2003 6:35 pm Post subject:

relyt · Posted: Mon Jan 06, 2003 7:15 pm Post subject:

Naan Yaar · Bodhisattva Joined: 27 Jun 2002 Posts: 1549

AFAIK, you would assign multiple default routes to multiple interfaces. The kernel will do "load balancing" on an IP by IP basis.

exazoid · n00b Joined: 01 Nov 2002 Posts: 6

The way the kernel does it actually depends a little on your setup. AFAIK, if you specify :